Optical element of led display apparatus and led display apparatus

Abstract

A light emitting diode (LED) display apparatus is provided. The LED display apparatus includes an LED module comprising a plurality of LEDs mounted on a circuit board; and an optical film comprising a plurality of unit lenses configured to cover the LED module and transmit light emitted from the plurality of LEDs, wherein at least one of the plurality of unit lenses has a cross-lenticular lens shape or a cross-prismatic lens shape.

What is claimed is: 
     
         1 . A light emitting diode (LED) display apparatus comprising:
 an LED module comprising a plurality of LEDs mounted on a circuit board; and   an optical film comprising a plurality of unit lenses configured to cover the LED module and transmit light emitted from the plurality of LEDs,   wherein at least one of the plurality of unit lenses has a cross-lenticular lens shape or a cross-prismatic lens shape.   
     
     
         2 . The apparatus as claimed in  claim 1 , wherein each of the plurality of LEDs forms one sub-pixel, and a plurality of sub-pixels form one pixel of a screen of the LED display apparatus. 
     
     
         3 . The apparatus as claimed in  claim 2 , wherein the one pixel is formed using a red LED, a green LED, and a blue LED. 
     
     
         4 . The apparatus as claimed in  claim 1 , wherein a cross-sectional shape of the plurality of unit lenses comprises at least one of a triangle, a round, a triangle having round corners, and a polygonal having round corners. 
     
     
         5 . The apparatus as claimed in  claim 4 , wherein at least two unit lenses from among the plurality of unit lenses have a different size of a cross-sectional shape. 
     
     
         6 . The apparatus as claimed in  claim 2 , wherein multiple unit lenses overlap one sub-pixel. 
     
     
         7 . The apparatus as claimed in  claim 6 , wherein a number of the unit lenses overlapping one sub-pixel is equal to or greater than five. 
     
     
         8 . The apparatus as claimed in  claim 2 , wherein a width of a unit lens is in a range of 20 μm to 50 μm. 
     
     
         9 . The apparatus as claimed in  claim 1 , wherein a raw material of the optical film comprises at least one of acryl, polyethylene, polyethylene terephthalate (PET), resin, and silicone. 
     
     
         10 . The apparatus as claimed in  claim 1 , wherein the optical film is bonded to the LED module using an adhesive. 
     
     
         11 . The apparatus as claimed in  claim 1 , wherein the optical film further comprises a diffusing agent that is in a spherical shape. 
     
     
         12 . The apparatus as claimed in  claim 11 , wherein the diffusing agent has a porous surface. 
     
     
         13 . The apparatus as claimed in  claim 11 , wherein a diameter of the diffusing agent is smaller than a width of a unit lens of the optical film. 
     
     
         14 . The apparatus as claimed in  claim 1 , further comprising:
 an LED panel comprising a plurality of the LED modules arranged in a matrix form; and   an LED cabinet configured to support the LED panel and transfer at least one of power and a driving signal to the LED panel.   
     
     
         15 . A light emitting diode (LED) display apparatus comprising:
 a plurality of LED modules, each of which comprising a plurality of LEDs mounted on a circuit board in a matrix form;   an LED panel on which the plurality of LED modules are arranged in a matrix form; and   an optical film comprising a plurality of unit lenses configured to cover the plurality of LED modules and transmit light emitted from the plurality of LEDs,   wherein at least one of the plurality of unit lenses has a cross-lenticular lens shape.   
     
     
         16 . The apparatus as claimed in  claim 15 , wherein at least one of the plurality of unit lenses has a cross-prismatic lens shape. 
     
     
         17 . The apparatus as claimed in  claim 15 , further comprising an LED cabinet configured to support the LED panel and transfer at least one of power and a driving signal to the plurality of LED modules. 
     
     
         18 . The apparatus as claimed in  claim 17 , wherein at least one of the power and the driving signal is provided from an external source to the LED display apparatus.